FN Archimer Export Format PT J TI Observations of a Deep Submesoscale Cyclonic Vortex in the Arabian Sea BT AF DE MAREZ, Charly CARTON, Xavier CORREARD, Stephanie L'HEGARET, Pierre MORVAN, Mathieu AS 1:1;2:1;3:2;4:1;5:1; FF 1:;2:;3:;4:;5:; C1 Univ Brest, Lab Oceanog Phys & Spatiale LOPS, IUEM, Plouzane, France. SHOM DOPS STM DTO, Toulouse, France. C2 UBO, FRANCE SHOM, FRANCE UM LOPS IN WOS Cotutelle UMR copubli-france IF 4.72 TC 20 UR https://archimer.ifremer.fr/doc/00695/80731/84552.pdf LA English DT Article DE ;submesoscale;observation;Arabian Sea;vortex AB Submesoscale coherent vortices (SCVs) are numerous in high-resolution numerical simulations, but their observations are scarce. Among the few in situ available measurements of SCVs, a vast majority concern anticyclones. No cyclonic SCV with large dynamical Rossby number (|zeta/f| > 1) has ever been sampled. This suggested that such small cyclones may lack robustness. Here, we present in situ measurements of an intense cyclonic SCV in the Arabian Sea. This eddy lay at 600 m depth, with a Rossby numberRo=O(1)and a dynamical Rossby number|zeta/f| > 1.5. This cyclone was most likely generated at the mouth of the Gulf of Aden. It trapped and advected Red Sea Water, from there on. This highlights the role of deep SCVs in the spreading of salty waters across the Arabian Sea. PY 2020 PD JUN SO Geophysical Research Letters SN 0094-8276 PU Amer Geophysical Union VL 47 IS 13 UT 000551465400037 DI 10.1029/2020GL087881 ID 80731 ER EF